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(No Model.)

H. BURTON.

GUT-OFF VALVE.

No. 818,597. Patented May 26, 1885.

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UNITE ia TATES PATENT Fries..

HENRY BURTON, OF PORT HURON, MICHIGAN, ASSIGNOR TO XVM. S. JENKLB AND ORRIN L. JENKS, OF SAME PLACE.

CUT-OFF VALVE.

SPECIFICATION forming part of Letters Patent No. 318,597, dated May 26,18E5.

Application filed Januar)` 9., 1885.

T0 @ZZ whom t may concern:

Be it known that I, HENRY BURTON, of Port Huron, in the county of St. Clair and State of Michigan, have invented new and useful Improvements in Cut-Off Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

rllhis invention relates to certain new and useful improvements in the construction and operation of what are ordinarily termed automatic cut-off valves for steam-engines, by means of which the steam can be automatically eut off at any desired point of the stroke.

The invention consists in so constructing and combining the valves with their operating devices that they are actuated by the eccentric in the usual manner and in opposite directions by the governor when cutting off steam; also, in thepeculiar construction ofthe various parts and their combination, as more i'ully hereinafter described.

Figure 1 is a perspective view of my improved automatic cut-off valve with a section of the steam-chest. Fig. 2 is a vertical section showing the connection with the governor. Fig. 3 is an enlarged diagram of some of the operating parts. Fig. 4 is a modification showing the fixed pivotal points traveling in a cross-head instead of vibrating at the ends of links, as in Fig. 1.

In the accompanying drawings, which form a part of this specification, A represents the steam-chest, having the usual ports adapted to be closed or opened by the reciprocating motion of the valves B, the outer faces of which are provided with the guides C, rigidly secured thereto or cast integral therewith. The inner or adjacent edges of these valves are pivotally connected to the short links D, the opposite ends of which are in like manner connected with one ot' the arms of the bell-crank levers E, the other arms of which are pivotally connected with the upper end of the links F, the other ends of which are similarly connected with the foot of the standard Gf, which is stepped on the step H, which is rigidly secured to one side ofthe steam-chest wall, as shown. rIhe bell-cranks (No model.)

are pivotally connected with and secured to the cross-heads I, which are secured to the valvestem J in such manner as to move with the reciprocation of said stein when the latter is suitably connected with an eccentric and the engine in motion. The cross-heads I have extensions a, which in turn have flanges b, adapted to move in the slides C. The standard G is connected by the rod K with the governor L.

In practice the link and bellcrank connecA tions between the valves and the standard will so lock the valves together in whatever position they may be placed that no interfeivence with or derangement of their reciprocating Vmovement will occur, while the action of the governor will, through the intervening mechanism, cause the valves to cut oft automatically at the desired point by compelling such valves to move toward each other or in contrary directions. Now, the same results will follow it' the links F are omitted and the adjacent ends of the bell-crank levers are provided with wrists, as shown in Fig. 4, which slide in a cross-head secured to the standard, and I consider that this modification is within the spirit of my invention.

The operation of the links F, aside from their function of locking the bell-cranks E E, has a very beneiicial action upon the valvc motion, for it will be noticed that, owing to their radial movement, they will move the valves near the ends of the strokes faster than a direct connection with the valve-stein would do.

'What I claim as my invention is- 1. In an automatic cut-off, the combina-tion, with a single pair of independent valves, of a single valve-stem, by which they are moved simultancousl y in the same direction, a steamgovernor, and connections arranged within the steam-chest and operated by the governor, whereby said valves are moved in toward or from each other to control the amount of steam, as set forth.

2. In an automatic cut-off, the combination, with a single pair of valves, B B, serving to control the steam-ports of a steam-chest, of a valve-stem adjustably connected with said valves to move them simultaneously in either IOO direction, @steam-governor, and Connections, Istem J, of the governor-standard G, bellas described, arranged within the steam-chest crank levers E E, and links F D, arranged 1o and between the ValvesB B, whereby the said and operating as and for the purposes set governor will serve to operate the valvesV in forth.

5 opposite directions to control the stemnsup- HENRY BURTON.

ply, as set forth. Vitnesses:

3. The combination, with the two Valves-B H; S. SPRAGUE,

B, having guides C, the Cross-heads I, and E. SGULLY. 

